Poration



Dec. 18, 1923. 1,478,265

E. s. STIMPSON WARP STOP MECHANISM 'FOR LOOMS Filed Nov. 17. 1922 v 2 Sheets-Sheet 1 ATTOF? /\/E Y Dec. 18 1923.

E. S. STIMPSON WARP STOP MECHANISM FOR LOOMS Filed Nov. 17, 1922 2 Sheets-Sheet 2 ATTORNEY Patented Dec. 18, 1923.

UNITED STATES PATENT OFFICE.

EDWARD S. STIIVIPSON, OF HOPEDALE. MASSACHUSETTS, ASSIGNOR TO DBAPER COR- PORATION, OF HOPEDALE, li'IASSACI-IUSETTS, A. CORPOBATIGN OF MAINE.

WARP-STOP BIECHANISIM FOR LOOMS.

Application filed November 17, 1922.

To all whom it matg concern:

Be it known that I, EDWARD S. SrIMrsoN, a citizen of the United States, residing at l-lopedale, in the county of Worcester and State of Massachusetts, have invented an Improvement in Warp-Stop hlechanisms for Looms, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to warp stop mechanisms for looms through the instrumental ity of which the loom is brought to rest when a warp thread breaks or becomes too slack for proper weavlng purposes.

The present invention is, in some respects, a further development and improvement of the warp stop motion shown and described in the patent to Edward S. Stimpson, No. 1,409,426, March 14, 1922, and more particularly of the warp stop motion shown and described in an application of Edward S. Stimpson, Serial No. 525.705, filed December 29, 1921.

In the Stimpson application to which reference has been made, movement of the .feeler and its sensitiveness of operation were effected by means of anti-friction devices interposed between the feeler and its support, the effect being that less force has been found necessary in giving the fecler its detecting movements and injury to the drop wires has been correspondingly avoided. The present invention has for one of its objects a further improvement in sensitizing the feeler action and the avoidance of. injuryto the warp wires.

Certain other improvements have been. de veloped in accordance with the present invention in connection with the drop wire guides and feelers, all of which will be more fully explained in connection with the accompanying drawings which show one good practical form of the invention.

In the drawings:

Fig. l is a perspective view of sufficient portions of the warp stop motion proper in separate relation, having the present invention associated therewith;

Fig. 2 is an under side perspective view of one member of the feeler carrier showing more particularly the anti-friction rollers and the means for holding them in place;

Serial No. 601,624.

ig. 3 is a side elevation 01" the main 'tions of the warp stop mechanism; and ig. 4 is a section on line l4- of Fig. 3.

The invention is h rein shown as associated with the warp stop motion of general character or that shown in the Stimpson patent and Stimpson application hereinbefore mentioned, but in some respects, as will more fully appear, features of the present invention may be employed in connection with any type of warp stop mechanism.

It has been found in practice that where the teeler is given its detecting movement either under actuating mechanism or by gravity, a moving force for the feeler has been required of such strength or intensity as to frequently injure the drop wires when they, or one of them. move into feeler stopping position, and one of the purposes of the present invention is to overcome the objectionable action of the feeler on the drop wires and to render the feeler sensitive to a light actuating force tending to move it, so that when the feeler is arrested in its detecting movement by a drop wire, the actuating force is not sufficient to injuriously effect the drop wire. '7

The drop wires, as usual in mechanisms of this type, are guided in their movement by drop wire guides and the present invention has for another feature thereof an improved character of drop wire guides, their holding means and also of the feeler mechanism which cooperates with the drop wires to effect loom stoppage.

In thethe drawings the loom frame 1 is of usual construction and'at each side is provided with a bracket 2 on which is adjustabl mounted the support 3, one at each side of the loom. In the present instance the support 3 is adjustably secured to the bracket 2 by a bolt 4 so that it may be conveniently moved or adjusted to proper position and then clamped in place.

Each of the bracketsv 3 is provided with guide wire sustaining means and, as'shown, such means consists of the lugs 5 mounted on the brackets 3 and each having a recess for the reception of an end portion of one of the drop wire guides 6.

In order to hold all. of the drop wires, of which there may be several, in place, a novel form of cap piece is employed in connection with the present invention, This cap piece, Fig. 1, is formed as a member 8 having portions 9 which overlie the supporting ends of the drop wires and side portions 10 which cover the ends of the drop wires to prevent longitudinal movement thereof when the cap piece is in clamping position. In the present instance the cap piece 8 is pivotally mounted at 11 on the bracket 3, it being understood that such bracket 3 and cap piece are employed at each side of the loom. The other end portion of the cap piece is provided with an opening 12 by which the cap piece may be secured in drop wire guide clamping position when the cap piece is moved about its pivot 11 into opera tive position. A clamping screw 13 affords a convenient means for clamping the cap piece 8 to the support 3 when the cap piece is turned into its clamping position.

Fig. a shows the cap piece in its drop wire guide clamping position, with the portions 9 of the cap piece overlying the ends of the drop wire guides 6 and the side portion 10 of the cap piece covering the ends of the drop wire guides, the construction being such that when the cap piece is in clamping position, the portions 9 firmly hold the ends of the drop wire guides upon the support 3 while the side portion 10 of the cap piece covers the ends of the drop wire guides and prevents longitudinal movement of the drop wire guides. The drop wire guides 6 are preferably formed circular in cross-section for convenience of manufacture and for eifective guidance of the drop wires.

The feeler carrier comprises the end members 1 1 between which extend the feelers 15 preferably formed circular in crosssection/ The side members 1 1 or the "feelercarrier are provided with recesses for the reception of cylindrical end portions of the feelers 15 and, as shown in the present instance, such recesses are formed in a block or plate 16 for convenience of manufacture. The plate 16 is. provided with the opening 17 for the clamping screws which hold the cap plate 18 in its tteeler clamping position. As shown in Fig. 1, the cap plate 18 has the horizontal flange portion 19 for overlying the cylindrical end portions oi? the feelers and the side flange 20 which covers the ends of the feelers 15 when the. cap piece 18 is secured in position by the bolts or screws 21which pass through holes 22 in the flange 19 of the cap piece and the hole 17 of the plate 16. The construction is such that when the cap plate 18 is clamped in its feeler holding position the screws or bolts 21 secure the cap piece in place and also hold the plate 16 upon the side members 1 1 of the feeler carrier without permissive endwise movement of the feelers.

Each feeler carrier 14: in accordance witl the present invention is provided with antifriction rollers, as shown in Fig. 2. The under portion of each of the side members 14 is provided with sockets or recesses 23, Fig. 2, in which are placed the anti-friction rollers 21% having a grooved portion be tween the ends thereof which are engaged by a holder 25 secured to the side member 14 by a bolt or clamp 26. In the present instance, the holder 25 consists of a metal rod which is clamped to the side member of the feeler by plate 27 held by the screw 26 to the side member of the teeler carrier. The construction is such that while the anti-friction rollers 2 1- may move in the recesses or openings 23 of the side members or" the feeler carrier, they will be effectively held in place by the holder 25 and constitute anti-friction roller means between the feeler and its support for sensitizing the feeler movements.

Each of the side members 1 1 off the tteeler carrier is provided with an upstanding arm 28 having a pin 29; which engages an opening 30 in an arm 31 secured to the rock shaft 32. The rock shaft 32 and its associated means constitutes one form oi tuator for the feeler, and in the present instance, the rock shaft 15 is carried in suitable bearings in the side supports 3 of the warp stop motion proper. The rock shaft 32 is given its rocking movements through a train of mechanism which may be substantially the same as shown and described in the patent hereinbetore men tioned, and as such features constitute no essentials of the present invention, further description thereof is unnecessary.

In the type of warp stop mechanism shown, the side brackets 3, are provided with supports 33 and when the feeler car rier is placed in operative position with the pin 29 engaged with the slot 30. connected to the actuator, the anti-friction rollers 24 constitute the anthtriction means etween the teeler carrier and its support.

The drop wires which are normally supported by the drop threads during weaving may be variously formed, but in the present instance they are of the general character of drop wires shown and described in the Stimpson patent above mentioned, and as indicated in 3, each of the drop wires 34 has a guide slot 35 through which passes a cylindrical drop wire guide 6, and each drop wire has an enlarged head portion which, when interposed between one of the cylindrical feelers 15 and the associated cylindrical drop wire guide 6 will arrest movement of the teeler and cause loom stoppage through a train of mechanisn. which may be substantially the same as that shown and described in the Stimpson patent.

When the parts are in assembled position, as indicated in Fig. 3, the cylindrical drop wire guides 6 have their end portions clamped in position by the cap piece 8 associated with each support 3, and the side portions 10 of the cap piece prevent longitudinal movement of the drop wire guides. The feelers which are circular in crosssection are likewise clamped in place by the single clamping piece 18 which overlies the cylindrical end portions of the feelers with the side portion 20 of the cap piece covering the ends of the feelers and preventing endwise movement thereof. The anti-friction rollers 24 which are interposed between the side members 14 of the feeler carrier and the supports 33, with relation to which the feeler carrier is moved in its detecting operation, render the feeler mechanism operable by a light force tending to move it, with the re sult that when a drop wire is in loom stopping position and arrests movement of the feeler, it readily overcomes the light force tending to move the feeler and without injurious efi'ect upon the drop wire itself.

The advantages of the present invention are observable in any loom where the present invention is employed, but is more readily manifested in a broad loom where the weight of the feeler carrier must of necessity be greater than in a narrower loom. However, the invention is not restricted to use in a broad loom but may be employed in any loom with advantageous results.

What is claimed is:

l. A warp stop mechanism for looms, comprising, in combination, a series of drop wires, guides for directing the movement of the drop Wires, a feeler carrier having a feeler for cooperating with a drop wire when the latter is released by a broken or too slack warp thread, anti-friction rollers mounted on the feeler carrier and interposed between the feeler carrier and its support, and an actuator for moving the feeler carrier and feeler.

2. A warp stop mechanism for looms, comprising, in combination, a series of drop wires, guides for the drop wires, a feeler carrier comprising side members, antifriction rollers between the side members of the feeler carrier and its support, and an actuator for moving the feeler carrier on the anti-friction rollers.

3. In a warp stop mechanism for looms, the combination of a series of drop wires which are normally supported by the warp threads during weaving, drop wire guides for guiding the drop wires, a feeler having a detecting movement and adapted to be ar-- rested by a drop wire when one of the warp threads becomes broken or too slack for weaving purposes, anti-friction rollers between the feeler and its support, and an actuator for moving the feeler on the anti friction rollers for cooperation with the drop wires.

4. In a warp stop mechanism for looms,

the combination of a series of drop wires adapted to be supported by the warp threads during weaving, drop wire guides for guiding the drop wires, a feeler carrier having a feeler mounted thereon, a support for the feeler carrier and on which it has relative movement, anti-friction rollers between the feeler carrier and its support, and an actuator for moving the feeler carrier on the anti-friction rollers relative to the support.

5. A warp stop mechanism for looms, including, in combination, a series of drop wires, a drop wire guide, a feeler carrier having side members each provided with a recess, an anti-friction roller within the re cess of the side members and on which the side members rest, a support on which the anti-friction rollers bear, a feeler mounted on the feeler carrier, and an actuator for moving the feeler carrier on the anti-friction rollers.

6. A warp stop mechanism for looms, including in combination, a series of drop wires, a drop wire guide, a feeler carrier having side members each provided with a recess, an anti-friction roller within the recess of the side members and on which the side members rest, means for holding the anti-friction rollers in the recesses of the side members.

7. In a warp stop mechanism for looms, the combination of a series of drop wires, a drop wire guide, a feeler carrier having a feeler for cooperating with the drop wires, an actuator for the feeler carrier, and antifriction rollers mounted on and removable with the feeler carrier when it is moved from operative'position relative to the drop wires.

8. In a warp stop mechanism for looms, the combination of a series of drop wires, a drop wire guide, a feeler carrier having a feeler for cooperating with the drop wires, an actuator for the feeler carrier, and antifriction rollers, and means connected to thefeeler carrier for supporting the anti-friction rollers on the feeler carrier.

9. In a warp stop mechanism for looms, the combination of a series of drop wires normally supported by the warp threads during weaving, open supports at each side of the loom, drop wire guides substantially circular in cross-section and having end portions sustained by the said open supports, a cap piece having a portion which overlies a supported end of the drop wire guides to retain them in the open supports and another portion which covers the ends of the drop wire guides to prevent endwise movement, and means for securing the cap piece in operative position on the support.

10. In a warp stop mechanism for looms, the combination of a series of drop wires normally supported by the warp threads during Weaving,supports at each side of the loom having open sockets, drop Wire guides substantially circular in cross-section and having end portions sustained in the said sockets, a cap piece having a portion which overlies a supported end of the drop Wire guides to retain them in the open sockets, and another portion which extends on the outer side of a support and covers the ends of the drop Wire guides to prevent GIIClWiSE movement, and means for securing the cap piece in operative position on the support.

11. A Warp stop mechanism for looms,

comprising, in its construction, a series of drop Wires, supports at each side of the loom having open sockets, drop Wire guides extending between the supports and resting in the. open sockets, a cap piece -for securing the drop Wire guides to one of the supports and having covering portions Which overlie the ends of the drop Wire guides to retain them in the open sockets and a portion for preventing endwise movement of the drop Wire guides on thesupport, and devices for securing the cap piece in position.

12. In a Warp stop mechanism for looms, the combination of open soc-keted supports at each side of the loom, drop Wire guides extending between and resting in the open socketed supports, a cap piece pivoted. to one of the supports and having two portions, one to overlie the supported ends of the drop Wire guides and retain them in the open socketed supports and the other to extend over the extreme end of the guide to prevent lengthwise movement thereof and means for clamping the cap piece in position.

In testimony whereof, I have signed my name to this specification.

EDWARD S. STIMPSON. 

